Impossible aerogel that reflects more visible light than it receives prompts scepticism

Researchers in China claim to have produced a photoluminescent aerogel with a visible light reflectance of 104%. When placed outside in the sun, they found that the material could cool surfaces by up to 16°C below ambient temperature. Moreover, the material is self-healing, recyclable, compostable, and environmentally friendly. However, other researchers have expressed scepticism about several aspects of the researchers’ claims. They nevertheless believe the technology could have promising applications in paints.